Spray head



Qct.- 15, 1929. 6,5. Mur-:LLER y 1,731,497

l SPRAY HEAD Filed Maren 14, 1927 Patented` Oct. 15, 1929 i J UNITED STATES PATENT OFFICE GODFREY A MUELLERQOF POINT PLACE, OHIO, AssIGNOB, ToTHE Dnrvrmarss c0111- rmx, or TOLEDO, OHIO, A yconrorwTTIon Oromo SPRAYHann application area march 14, 1927.4 'serial No. 175,126.

j This invention relates tospraying devices, and particularly to aspray-head for sprayguns,

\ the, application of Vpaint and other surface coating materials in bothround and iattened or fan stream form.

The object efficient means, other than .the nozzle members of thespray-head, which is manually operable to Open or close thesupplemental; jets'from which the stream Hattenlng air discharges.

"l The invention is fully described in the followingl specification andtwo embodiments `thereof illustrated in the' 4accompanying drawings, inwhich,

Figure 1 is a central longitudinal sectional view of a spray-headembodying the inven- 2v o` ftion with the valve' member partly brokenIaway. Fig. 42 isa front end elevation thereof. Fig. 3 is a sideelevation of slightlymodl- 'fied form of spray-head with a`port1on 1ncentral longitudinal section and with the y valve member disposedinteriorly ofthe outer nozzle. Fig. 4 is a front end elevation thereof,andv Fig. 5 is a cross-section on the 'line 5-5 in Fig. 3. y

Referring particularly to Figs. 1 and. 2'of the drawings, 1 u spray-headembodying the invention 'and 2 the outer nozzle. The inner nozzle, inthe lpresent instance, has itsl forward end reduced and terminating in asmall nipple 3 having a restricted axially disposed discharge orifice 4therethrough, which communicates through the hollow interior of thenozzle member 1 v with a source of supply of thev material to besprayed. The rear end portion of the nozzle 1 has an enlargement 5adapted to be threaded at its rear end into a gun or holder body, orsecured thereto in any'other suitable manner, as wellunderstood in theart.- The forward end of the enlargement 45 is shown as? terminating atthe rear of the nozzle end in an annular forwardly facing shoulderforming an undercut or inner conical seating face 6, against which therearend of the outer nozzle2 is adapted to seat and to which it may bereleasably hel d by a union nut 7.

or'the like, used more particularly for' of the inventlon is theprovision ina device of this character of simple and designates theinner nozzle of l The outer nozzle 2 is hollow or bored out to encirclethe nozzle 1 in advance of-its enlargement 5 to formv an air space 8therebel tween in communication through passages 9 in said enlargementwith a suitably controlled air supply, as well understood in the art.The bore of the outer nozzle is reduced at its forward end to form arestricted main air discharge orifice 10,l which receives-the .nipple 3of the inner nozzle and forms an annular discharge-passage therearound.

`The nozzle 2 is provided at its forward end with apair of forwardlyprojecting bosses 11, one at each of opposite sides of thel orifice 10in transversely spaced relation thereto and each having its vinner sideforming arcuate faces 12 of a common circle, concentric to ,the

nozzle orifices '4 and l0, or substantially so.

Each boss has a supplemental air discharge orifice 13 extendingtherethrough with its rear end in communication with the airspace 8 ofthe spray-head'and with its outer end opening through the arcuate face12.of the boss and directed toward the axis line' of the nozzles, sothatl air discharged from the two supplemental passages 13 will meet ata point on said axial line, which is outwardly spaced a predeterminedextent from the main discharge orificesl of the nozzles, therebyeffecting a attening of the main material laden air stream, as wellunderstood in the art.

`In order to control the discharge of air from the supplementaldischarge passages 13, aring valve 14 is mounted between the bosses 11in complimental seating engagement with the inner'r'arcuate faces 12thereof and for turning movements relative thereto. This valve hasdiametrically opposed tapering portions 15, which, when the valve is inone position of its turning movement, completely close the dischargeends of the p'asasges 13,`

and when turned. inone ,directionl from such position, effect a gradualopening of the ypassagesto full open position, thus enabling thepassages to be fully or partially opened, as desired, for operatingpurposes. The tapered portions 15 ofthe valve terminate abruptly at oneend in inwardly extending shoulders so that the passages 13 may bequickly opened to full extent by turning the valve in a directate agrasping and turning of the same by the operator.

-While the` valve 14 is shown inuconnection with a particul-ar form ofspray-head, it will be understood that the use of the invention isnotconfined to any particularform or `f type of spray-head, so long as itmay have provision for the between the discharge passages. i

In Figs. 3, 4 and v5 the invention is modified to showv the ring valveas mounted within the outer nozzle member instead of Without thesame, asin Figs. l and 2.- .In-this vform of the invention, and 21 designatetheinner and outernozzle members, respectively,l

j with the aim-space 22 therebetween slightly enlarged over that shownin Fig.v 1 to facilitate-the mounting of the ring valve 23 Withg in saidspace. This ring valve, in the present instance, is shown as having aconical seat agalnst the inner surface of t-he outer lnozzle in closingrelation to the inner ends of the supplemental air discharge passages 24and having openings 25 therethrough adapted to be placed into orout ofregister with the inner ends of the passages 24 by aturning of the valveas is apparent. A stem 26 projects radially from the valve memberthrough a side opening 27 in the outer nozzle 21 to facilitate a manualturning ofthe valve from without the nozzle.

It is evident that in both illustrative embodiments of the invention aunitary valve member for controlling both supplemental air dischargepassages is employed; that said valve member is separate from bothnozzles of the spray-head, and that it is removable relative thereto toeffect an'opening, closing or regulation of the supplemental air jetsfrom without the spray-head and without ef- -fe'cting the adjustment ofone noz'zlen relative main orifice and forming mounting of the valve.14,y or one of similar type, c ends `ofi-the supplementalv airdischarge osses at its forward end equidistantly spaced from said mainorifice and each having an arcuate inner face concentric to the segmentsof a common circle, each of sai bossesalso vhaving a supplemental airdischarge orifice opening through its conical face, and a ring valvedisposed between and fitting said. arcuate aces and opera-ble tosimultaneously open or close said supplemental passages.

2. In a spray-head, inner and outer discharge nozzles cooperating tovform a main air discharge orifice and having a space therebetween incommunication with a source of ai'r pressure suppl said nozzles beingrelatively rotatable and said outer nozzle having supplemental airdischarge passages,

and a single valve associated with the outer -passages and operable tosimultaneously adjustablycontrol the discharge of air from the of thevalve relative orifice andv having diametrically opposed l The valve v bsupplemental passages by-rotary movements to the outer nozzle, the jaxis of adjustment of said valvebeing longil tudinal with respect airdischarge orifice.

In` testimony whereof I have hereunto signed my name to thisspecification.

GODFREY A. MUELLER.

to the axis of said main to the other, while such nozzles, at the sametime, are capable of relative rotary adjustment to place thesupplemental discharge jets in any position around the spray axis, asmay be desired to flatten the main or material laden stream in ahorizontal, vertical or other plane to suit the work being performed.

I wish it understood that the inventionis not limited to any particularconstruction,

arrangement or form of the parts, as it is' capable of numerousmodifications and changes without departing from the spirit of theclaims.

Having thus described my invention, what I claim as new and desire tosecure'by Letters Patent is: l j

1. In a spray-head, an outer air discharge nozzle having a main centralair discharge CERTIFICATE 0F CORRECTION.

Patent No. 1,731,497.y Granted October 15, 1929,`to

` GoDFREY A. MUELLER.

It is vhereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 94, claim 3, for the word "when" read "with"; and that the saidLetters Patent should be read with this-correction therein that the samemay conform to the record Iof the case in the Patent Office. i

Signed and sealed this 26th day of November, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner of Patents.

